【作者】 杨贵新；

【导师】 王博文；

【作者基本信息】 河北工业大学 ， 电工理论与新技术， 2006， 硕士

【摘要】 超磁致伸缩换能器是利用超磁致伸缩材料将电磁能转化为机械振动的一种机械装置。它具有结构紧凑、能量密度高、输出功率大的特点,在工业、生物医学和军事防御等行业有很好的应用前景。然而相对于国外,我国在超磁致伸缩换能器的研究方面还属于刚刚起步的阶段。因此,研制新型的超磁致伸缩换能器驱动系统,对于超磁致伸缩换能器的广泛应用具有重要的现实意义。 本文首先对超磁致伸缩换能器的样机进行实验研究:主要包括静态特性实验和动态特性实验的研究;测试了换能器的静态和动态特性参数。一方面通过研究不同频率交流驱动条件下换能器的输出特性,证明了所设计的换能器重复性比较好;另一方面确定了换能器合适的工作范围,为下面基于DSP的驱动电源的设计提供实验依据。 然后,对换能器的驱动系统进行了设计:介绍了适合数字化控制的SPWM调制方式,分析了逆变器的工作原理、控制方法及系统的输出特性和其它性能;分析逆变电源的各个环节,建立起逆变电源的数学模型和MATLAB数字控制仿真模型,并分别进行了仿真分析。 在此基础上对控制系统的软硬件进行了设计,硬件设计完成了基于数字信号处理器TMS320LF2407的逆变电源数字控制板,其中包括时钟电路、外部存储空间扩展、电压采样电路、过流保护电路、驱动电路等;软件设计主要是在CCS的集成环境下编写了逆变电源的数字控制程序,包括使用了改进的PI控制算法的电压环的设计、SPWM波的生成、保护功能的实现、AD采样等程序。更多还原

【Abstract】 The giant magnetostrictive transducer, using a giant magnetostrictive material as a main element, can transform electromagnetic energy into mechanical energy. It has many peculiarities such as compact configuration, thick energy-density, and big deferent power, and can be applied in biomedicine, military affairs recovery etc. Here we have carried out some research work about late-model driving system of the giant magnetostrictive transducer to develop the transducer.We have first made some experimental researches to the transducer including static behavior and dynamic behavior experiment, and have tested the characteristic parameters of static behavior and dynamic behavior. According to the experimental result, we analyzed the output character at various frequencies driving and found that the designed transducer has great reiteration. An appropriate work point has been confirmed and experimental gist for the following design of driving power has been afforded based on DSP.The driving system of the transducer has been designed. The digital control SPWM (modulate manner) has been introduced, then the article expounded work elements, controlling method and output character about inverter, analyzed every parts of inverter, built up mathematics model and MATLAB simulation model, made some simulation analysis.The hardware and software of control system have been designed. The hardware design finished the composing of the DSP controller including the clock circuit, the interface circuit of memorizer, driving circuit. The software design compiled digital control process of inverter in CCS circumstance including ameliorated PI control arithmetic, the creating of SPWM, implement of protecting, A\D sampling.更多还原